Turn off all power consumers.
Set the transmission to neutral position, cock the handbrake. Set automatic box to position "R".
Check ignition timing, see point 4.7.
Remove jumper wire (earth connection) to set the ignition timing.
Let the engine run for about 2 minutes at idle speed.
Check idle speed. Required value: 850±100 rpm.
Attention: The idle speed is automatically adjusted by the idle speed controller. In case of deviations, data from the failure memory should be read and the defect localized according to a special diagnostic plan.
Connect measuring devices with the ignition off.